Apparatus for the manufacture of steel.



G. J. STOCK. APPARATUS FOR THE MANUFACTURE OF STEEL. APPLICATION FILEDMAY 27, 1911.

1,004,929, Patented Oct. 3, 1911.

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COLUMBIA PLANOGRAPH CO..WI\SHINGTUN, I).C1

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G; J. STOCK. APPARATUS FOR THE MANUFACTURE OF STEEL.

APPLICATION FILED MAY 27, 1911.

Patented Oct. 3, 1911.

2 SHEETS-SHEET 2.

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GUY JAMES STOCK, OF DARLINGTON, ENGLAND.

APPARATUS FOR THE MANUFACTURE OF STEEL.

Specification of Letters Patent.

Application filed May 27, 1911. Serial No. 629,939.

To all whom it may concern:

Be it known that I, GUY JAMES STOCK, a subject of the King of GreatBritain and Ireland, residing at Darlington, in the county of Durham,England, have invented certain new and useful Improvements in Apparatusfor the Manufacture of Steel; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

This invention relates to Bessemer converters in which the materials tobe refined, instead of being dealt with in the converter only, asdescribed in the specification of my former Letters Patent No. 935,615,dated 28th September 1909, are first melted in a separate furnace andthen refined in the ordinary or well known converter by means ofcompressed air. The materials are melted in a furnace heated by thecombustion of oil, gas, coke or coal, oramixture of all these, the wasteheat from which is recovered in an economizer and utilized to heat theair required for combustion of the necessary fuel for heating andmelting the raw materials such as pig iron and scrap in the meltingfurnace to be used in the converter; also for heating the air requiredin the converter for converting the molten iron into steel.

The object of my invention is to work the melting furnace continuouslyand both melting furnace and converter economically by providing thatthe waste hot gases from such melting furnace shall pass through aneconomizer built up of pipes or other suitable contrivances by which thewaste heat is utilized and transferred to the compressed air used bothin the melting furnace and the converter.

In order that suitable apparatus may be provided, erected and operatedfor the purpose of my invention, I will now proceed to further describethe same, and in doing so shall refer to the accompanying drawing, itbeing understood that the invention is not restricted to the actualconstruction or arrangement of the parts or details shown which are tobe taken as illustrating what is adapted for conveniently carrying outthe process ofsteel making essentially as hereinbefore set forth.

In the drawing, Figure 1 is a sectional elevation of such an apparatusin its entirety taken on line a2 022 of Fig. 2 which is a correspondingplan view which is partly in section.

A is the melting furnace in which the raw materials such as pig iron andscrap are charged through the doors a a a said furnace communicatingwith a receiver A for collecting the molten metal. In order to heat thefurnace oil jets a a may be employed in conjunction with the requisitesupply of air already heated by the waste heat of said combustion whichis recovered in an economizer chamber B and utilized to heat the airrequired for this purpose as well as for carrying out the refiningprocess in the converter G. The economizer B is built up of pipes 79 bor otherwise arranged so that the air passes through long passages incontact with ample surfaces which have absorbed the waste heat receivedfrom the melting furnace, which waste heat is thereby transferred to thecompressed air to be separately supplied to both the melting furnace Aand to converter 0. To conveniently effect this the economizer is builtup of two sections B and B one to provide heated air as required for themelting furnace, the other to provide heated air as required for theconverter, which may be of any known type; D being a chimney or uptakefor drawing the hot gases through the economizer. Air from the blowingengine is delivered into the economizer at E E and passing through thesystem of pipes b b to absorb. heat therefrom travels along a pipe F tothe melting furnace terminating in a twoway branch pipe leading into theblast boxes G G and through the twyers G G into the melting furnacereceiver A the hot air from the economizer B being passed by the pipe Fthrough the trunnions of the converter C. The furnace receiver A isprovided with a slag spout H, and a tapping hole I from which the moltenmetal is poured into a ladle and conveyed to the converter.

In conclusion I would observe that I am aware that it has been proposedto use a melting furnace and converter in such relation to each otherthat the waste gases from both are used for the purposes of economy thewaste gases from the converter to be used in heating the materialscharged into the melting furnace and the waste gases Patented Oct. 3,1911.

from the melting furnace to be used to heat the air required to carryout the combustion of fuel in the melting furnace, and I effect myproposed economy in conjunction with a continuously worked meltingfurnace by employing the waste heat from the melting furnace only forheating the air required in both the melting furnace and the converter,and the advantages incidental to my invention are as follows Economy inthe production of steel and the like due to the continuous working ofthe melting furnace, in conjunction with the economy eifected by the useof hot air derived from the waste gases of said melting furnace, whichhot air is utilized in working both melting furnace and converter.

Having fully described my invention, what I claim is In an apparatus ofthe character described, the combination of a melting furnace, aconverter, an econpmizer built in two sections for heating air by theproducts of combustion from the melting furnace, and means for using theheated air from one of said sections in the melting furnace and from theother in the converter, substantially as described.

In testimony whereof, I afliX my signature, in presence of twowitnesses.

GUY JAMES STOCK.

Witnesses H. S. BURN, J O. FLETCHER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

